Filter bowl construction



P 1951 J. L. EDELEN FILTER BOWL CONSTRUCTION Filed Oct. 23, 1947 FIG.2.

INVENTOR. JAMES L. EDELEN Q/K iv Q (r ATTORNEY Patented Sept. 4, 1951 UNITED STATES PATENT OFFICE James L. Edelen, Kirkwood, Mo., assignmto Carto: Carburetor Corporation, St. Louis, Mo., a corporation oi Delaware Application October 23, 1947,.Serial No. 781,592

1 Claim. (01. 285-22) This invention relates to locking means for threadedly assembled members such, for instance, as a body and settling bowl of a fuel filter. Heretofore, fuel filters of the type illustrated, particularly, in Kommer Patent No. 2,146,397, have been supplied with a. bail connecting the body and bowl ior maintaining the assembly of these two parts. It has not been feasible to threadezily attach the body and bowl because of the danger of unthreading as a result of engine vibration.

Accordingly, it is an object of the present invention to provide means for locking the bov.l and body when threadedly assembled so as to eliminate the use of the extra bail without the danger of unthreading mentioned.

This object and other more detailed objects hereafter appearing are attained by the device illustrated in the accompanying drawing in which:

Fig. l is a vertical section through a fuel filter embodying the invention.

Fig. '2 is a top view of the bowl disassembled.

Fig. 3 is a side view of the bowl disassembled.

Fig. 4 is a section on the curved line 4-4 of Fig. 2.

Fig. 5 is a section similar to Fig. '2 and showing a portion of the assembled gasket.

The filter comprises a die cast body member 6 having tapped inlet fitting l and outlet fitting 8 for attachment to the fuel line which stationarily mounts and supports the filter. An internally threaded sleeve 8 depends from the body for receiving the male threaded upper edge portion in of a glass bowl II. A depending annular lip II on the body provides for centering a ceramic filter element 13 which, at its upper end bears against the inner portion of a sealing gasket l4 and. at its lower end, rests upon a coiled spring l5 compressed between the filter element and the bottom of bowl II. The outer portion of gasket ll provides a seal between the bowl and body and a series of holes [6 in the gasket provide for passage of fuel between the bowl and filter. In operation, fuel enters through inlet 1 and drops into bowl H from whence it filters through element l3 and thence flows out through tapped outlet 8.

In order to prevent unauthorized unthreading of the bowl, locking means is provided which consists of a gasket iii of suitable yielding material interposed between the body and the upper edge of bowl I I; As best shown in Fig. 2, the outer portion of this bowl upper edge is provided with serrations or ratchet teeth II for embedding into gasket il in the assembly to thereby resist rotation of the bowl relative to the body in the unthrcading direction. Just inside of teeth ll there is provided on the bowl a smooth surfaced, annular ring l8 for sealing engagement with the gasket, as made necessary by the locking teeth, as illustrated in Fig. 5.

The invention is broadly applicable to any two threadedly coupled members for resisting unthreading, particularly due to vibration. Teeth may be provided on both members, butin the present instance where the body is stationarily mounted. only the bowl need be locked in the manner described.

The invention may be modified in various respects as will occur to those skilled in the art and the exclusive use of all modifications as come within the scope of the appended claim is contemplated.

JAMES L. EDELEN.

REFERENCES cI'rEn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 382,191 Redington May 1, 1888 715,891

Somerly' 16, 1902 

